Living in Catahoula, LA: what to set up and who to call
St Martin Water District 4 - Catahoula reported 7 health-based violations to EPA in the last five years: arsenic ×7. 78% of systems its size reported none. Catahoula has no town government of its own, so St. Martin Parish runs its elections and most services, and its children attend St. Martin Parish School District.
I’m new in town
What to set up in Catahoula, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Catahoula.
Power comes from Southwest Louisiana E M C
Southwest Louisiana E M C (Southwest Louisiana E M C), a cooperative utility, serves all of Catahoula. Its homes paid an average of 11.6¢ per kWh in 2025, about $162 a month (its average across Louisiana).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from St Martin Water District 4 - Catahoula
St Martin Water District 4 - Catahoula supplies Catahoula: about 62% of residents live in its service area. About 38% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated ground water (EPA lists St Martin Industrial Park Water System as seller) and serves 3,000 people in all.
7 health-based violations reported to EPA in the five years to October 2026: arsenic ×7, the latest beginning Apr 2026. 78% of the 7,966 systems serving 1,001–3,300 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 1.0 ppb, below the 15 ppb action level that applied. That’s lower than 52% of similar systems’ latest results.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0 (EPA’s estimate). Violations are counted by the start of their compliance period. LA1099004.
4 home internet providers serve Catahoula
89% of 473 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Cox Communications | Cable | 86% | 2,000/100 |
| AT&T | Fixed wireless | 82% | 25/3 |
| T-Mobile | Fixed wireless | 73% | 100/20 |
| Trinity Communications | Fixed wireless | 11% | 30/30 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Catahoula’s trash rules yet
Pickup rules, the dump and recycling in Catahoula.
Where your child goes to school
Public school districts and the school path by grade.
Catahoula is in St. Martin Parish School District.
Test scores and every school: see Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Catahoula is unincorporated, so St. Martin Parish is the local government.
Election office: FVAP local election office directory, updated Oct 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Catahoula is in ZIP code 70582
ZIP codes where Catahoula residents live, with the share of the town in each.
| ZIP | Post office name | Share of Catahoula | ZIP’s residents in Catahoula |
|---|---|---|---|
| 70582 | Saint Martinville, LA | 100% | 5% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Catahoula
Who supplies Catahoula’s drinking water, and has it had violations?
St Martin Water District 4 - Catahoula (EPA ID LA1099004). It reported 7 health-based violations to EPA in the five years to October 2026: arsenic ×7. 78% of systems its size had none. Its latest lead 90th percentile was 1.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Catahoula?
Southwest Louisiana E M C (Southwest Louisiana E M C), a cooperative utility. Its homes paid about 11.6¢ per kWh in 2025 (EIA).
What internet providers serve Catahoula?
Cox Communications, AT&T, T-Mobile, Trinity Communications (FCC, as of December 2025).
What ZIP codes are in Catahoula?
70582. Census 2020 ZIP Code Tabulation Areas.
What school district is Catahoula in?
St. Martin Parish School District.
How do I register to vote in Catahoula?
In Louisiana you can register online until 20 days before Election Day, in person until 30 days before Election Day, or by mail (postmarked 30 days before). Elections here are run by the St Martin Parish Registrar of Voters. Check your registration at voterportal.sos.la.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Aug 3, 2026 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.